Drop-press



*i UNITED STATES PATENT CFFICE.

MILO PECK, OF NEW HAVEN, CONNECTICUT.

DROP-PRESS.

Specification of Letters Patent No. 17,411, dated May 26, 1857.

To all whom t may concern.'

Be it known that I, Mino PECK, of the town and county of New Haven, inthe State of Connect-icut, have invented a new and useful Improvement inDrop-Presses; and I do hereby declare that the following is a clear,full, and exact description of the construction and mode of operationthereof, reference being had to the accompanying drawings, making a partof this specification, in which- Figure 1 represents the working portionof the machine complete without the frame, and with 'the drop raised.Eig. 2 is a vertical View of the machinery for raising and controllingthe dropthe dotted lines showing the position of the spring operating onthe catch by which the drop is locked up. Fig. 3 shows the operation' ofthe male and female V wheels by which the force of the drop iscontrolled. Fig. 4 shows the trip or lock by which the drop is held whenlifted to its greatest extent. Fig. 5 shows the operation of the fr'ontguard ring c preventing the dog a from lifting the drop, also the backguard ring I) over which the dog a runs as the drop falls. Fig. 6 showsthe portion of the male V wheel and of the guard rings b and cregulating the action of the dog a.

I will now describe the construction and mode of operation of myimprovement referring to the Letters Patent granted to me November 25,A. D. 1851, No. 8548, for a further description of my Inode of raisingand letting fall the drop.

The whole machinery is placed in a frame sufficiently heavy to preventjarring and trembling, and the following is the. manner of operating thesame. Upon the sweep shaft d the lifting crank e, ratchet sweep f,locking sweep g and female V wheel h are firmly fastened. The hub z'carrying the driving gear wheel and the ratchet wheel k, runs loose uponthe sweep shaft d. To the ratchet sweep f the dog L is attached, asshown, playing upon the ratchet wheel 7c, on the loose hub z'. Directlyunder the locking sweep g the lock or catch m is placed as shown in Fig.4. The lock on is operated by the foot of the workman by the rod a andthe treadle to which it is attached, and is pressed toward the lockingsweep g by the spring 0. The back guard ring b, Fig. 5, is fastened tothe frame in such a manner and position as to trip the dog a out of theratchet wheel la as soon as the drop is fully raised and the liftingcrank e just past its center.

The operation of the machine as far as described, is as follows. Thedriving gear wheel being set in motion in the direction shown in Fig. l,with the drop resting on the anvil, the dog a catches into the ratchetwheel 7c, thus locking the loose hub z'` and the sweep shaft d together,and as the driving wheel revolves the sweep shaft is carried with ituntil the drop is raised to its highest point where just as the liftingcrank passes its center, the locking sweep g is caught and held by thelock m. At the same time, the dog a` is tripped out of the ratchet bythe back guard ring b, so that the drop is at this instant heldsuspended, the hub ratchet wheel and driving gear revolving on the sweepshaft. As soon as the foot of the workman is applied to the treadle,operating upon the lock, the dog runs loose over the back guard ring,the drop falls with its whole force, and as soon as it drops the ratchetis again caught by the dog, and the operation repeated. It will be seenthat if the lock is held back so as not to catch, the blows of the dropwill be repeated as fast as the shaft can be carried.

The machinery, the operation of which has so far been described hasalready been secured to me by the Letters Patent alluded to, and I nowproceed to describe the mproveme'nts for which I now claim LettersPatent.

. Directly in front of the back guard ring b is the lnoyable guard ring0 plainly shown in Figs. 5 and 6. This guard ring is movable on thepivot p by means of the rod 1' and the treadle attached thereto. Whennot op- 'erated upon, it lies within the teeth of the ratchet wheel 7cbut when the guard ring c is drawn outward by thejtreadle, operating bythe rod r upon it, the dog is thrown out of the ratchet at the bottom,andas the lifting crank revolves the drop remains upon the anvil. Thispower of the/machine is very important in all cases where it isdesirable that the drop should rest for a time on the work before beingraised, and by means of the movable guard ring, the time for which thedrop may rest upon the work is regulated at pleasure.

I have described a female V wheel L fastened upon the sweep shaft d.`Nearly parallel with the sweep shaft d is the driving shaft sl on whichis fastened the male V wheel t, Fig. 6, and the driving wheel u. Thisshaft revolves in boXes U o placed in the frame w which frame is movablein a working machine about a quarter of an inch by means of the leveras, Fig. 3, and operated by the rod y and treadle thereto attached. Theoperation of these V wheels in this machine is as follows. Vhen the malewheel is lpressed against the female wheel, the two shafts Z and s arelocked together by the friction and the fall of the drop regulated sothat it isV made to descend as slowly Yas the lifting sweep revolves.The effect of the V wheels upon the machine is thus to lcontrol entirelythe force of the drop, which may be permit-ted to fall with the fullforce of its gravity or so held back as to descend only as the sweeprevolves, or it may be permitted to fall at any intermediate point.

I am aware that the V wheels by themselves are common property, and thata patent has been granted to Henry Bushnell for operating a drop bymeans of V wheels with a section of one wheel removed so as to lift vthedrop by means of the V wheels and permit it to fall with its full force,and I do not claim them when 'used in any such manner.

What I do claim as my invention and desire to secure by Letters Patentis- 1. The combination of the male and female V wheels with the sweepshaft cl, the ratchet wheel 7a, the dog a and the guard ring b, or theirequivalents, so that the fall of the drop can be regulated andcontrolled, substantially in the manner and for the purpose herein setforth.

2. I also claim the movable guard ring c in combination with the sweepshaft 0l, the ratchet wheel 7c and the dog'a, or their equivalents bymeans of which the time the drop shall remain upon the anvil can beregulated and controlled, substantially in the manner and for thepurpose herein set forth.

MIL() PECK.

In presence of- R. P. lWEADE, LUCIUs Gr. PEOR.

